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