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