Some quick notes:
• The lines of the same colors as the names in a group bind that group
• Two-tone names reflect people that cross into more than one group (Pink should be multi-colored and psychedelic!)
• The fact that there's no line between people doesn't mean they're not friends
• Wooderson is two-toned as a random person only because he's not a high school student.
• Note that, although they are friends for most of the movie, Benny and Pink are not friends at the end.