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