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