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)(7,15)(8,11)(9,13)(14,17)(16,18)(19,20,23,26)(21,27,28,34)(22,30,31,25)(24,32,33,29)(3,5)(4,9)(6,13)(7,16)(8,14)(10,17)(11,18)(12,15)(22,31)(25,30)(27,34)(29,32) involution — undirected(19,21,23,28)(20,24,26,33)(22,32,31,29)(25,34,30,27)(3,6,8,7)(4,10,11,15)(5,13,14,16)(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.