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