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