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