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