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