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