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