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