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