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