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