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