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