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