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