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