One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,9)(6,8)(7,10)(11,12,14,16)(13,15,17,18)(19,20,24,32,23,26,22,27)(21,28,31,25,29,34,30,33)(3,5,6,10)(4,7,8,9)(11,13,14,17)(12,15,16,18)(21,29)(25,33)(28,34)(30,31)(13,17)(15,18)(19,21,23,29)(20,25,26,33)(22,31,24,30)(27,34,32,28)(4,8)(7,9)(20,26)(25,33)(27,32)(28,34) 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.