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