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