One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4,6,8)(5,9,10,7)(11,12)(13,15)(14,16)(17,18)(19,20,23,25)(21,24,28,32)(22,26,29,33)(27,31,30,34)(3,5,6,10)(4,7,8,9)(11,13,14,17)(12,15,16,18)(21,27)(22,29)(24,31)(26,33)(28,30)(32,34)(12,16)(15,18)(19,21,23,28)(20,24,25,32)(22,30,29,27)(26,34,33,31)(4,8)(5,10)(12,16)(15,18)(20,25)(24,32)(26,33)(31,34) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.