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