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