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