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