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