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