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