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)(11,12,14,16)(13,17,18,15)(20,24)(21,27)(22,29)(25,30)(26,32)(28,33)(4,7)(8,10)(19,20,22,24,23,25,29,30)(21,26,27,31,28,32,33,34)(11,13,14,18)(12,15,16,17)(20,25)(24,30)(26,32)(31,34)(3,5,6,9)(4,8,7,10)(19,21,22,27,23,28,29,33)(20,26,24,31,25,32,30,34)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.