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