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