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