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