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