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