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