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