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