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