There's never just one way to create visual notes, especially when they are created live. And at a large scale. That can make capturing a panel talk more of a challenge for some people. It takes a bit more flexibility than a clearly defined presentation.

I tend to capture panel discussions in a way that highlights the key points of the discussion as a whole. Not a series of summaries of what each person contributed. Since discussions tend to be rather fluid, the final visual makes much more sense that way. Speakers tend to like it better that way, too. So often key points build on what another speaker said, so there's no chance of misattribution when you capture the discussion as a whole.

The visual notes above were created during a panel discussion at TechInclusion last fall. You can see the whole set of visual notes created live, on-site there in this Flickr album.