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