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