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