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