First of all, congratulations on the invitation. At your level of studies that isn’t common, so someone must think you’re pretty with it.
I’ve done talks too numerous to recall, and have been on or organized lots of panels, one award winning. I’ve also been session chair for lots of sessions, been on the program committee of a very large EE conference for over 15 years, and have been program chair and general chair for it. I’ve founded a bunch of workshops, and have been program chair for quite a few.
First of all: bio. Not that important. It is needed for the session chair to introduce you - it is often done seconds before the session. All you need is where you are going to school now, where you got your BA, and your research interests.
I don’t know about history, but no one in my field ever reads from a script - unless they are foreign presenters with a very fuzzy knowledge of English. Reading your presentation sounds terrible.
The best advice I have for your talk is - practice. Make sure you will hit the time alloted. Running over or running under is a bad thing. Start a stop watch, and do your talk, over and over, until you get the timing right. Look for places where the flow of the talk seems off. For me this is when I start referring to things five slides in the future. That means you might want to reorganize it.
Assuming that you are using PowerPoint, follow the guidelines the conference gives out. If they don’t give out any, try the following:
No more than five or six bullet points per slide.
Bullets no more than one line, two at the very most.
Make sure the colors you use are visible in a large room. We use yellow on blue.
Use lots of pictures if possible.
Don’t use complete sentences.
Most of all, don’t read your slides. The bullets should be a guide to you to jog your memory about the next point.
Don’t worry about questions from the audience. Our conference has a rule that session chairs should cut off hostile questions to students. If your professor will be there, he or she should come to your defense, but most people are reasonable. Professors and grizzled industry veterans are expected to handle any hostility.
Is the panel the way presenters answer questions, or is about a specific subject? If the former, my points about questions apply. If the latter, think before your answer.
One more thing, that my advisor taught me. Listen to the talks before yours, and refer to them, briefly, if appropriate. It makes you sound more with it. Sometimes consecutive people make the same point - acknowledging this will win you points with the audience.
For dress, ask your professor. Suits or jackets are pretty much always fine (and they’ll cut you slack for being over-dressed) but most experienced presenters at my conference no longer wear them. I did in 2006, but only because my talk was right after me being on stage for the plenary.
Basically, use this experience for networking and practice. My first talk was as a Masters student, and I was in the dark because my advisor had just died on me. Looking back I made a perfect hash out of it, but the audience was very nice and I eventually did well in the field, eventually becoming program chair of the conference. The best thing about it was that I was at the lunch table of the author of the paper that got me interested in the area, that was cool. When you network, listen, but don’t hesitate to ask some questions. Look for people whose work you especially like.
Good luck, don’t worry, and practice!