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