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