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)(11,12,14,16)(13,17,18,15)(19,20,24,27)(21,28,31,34)(22,26,32,33)(23,30,25,29)(4,7)(8,10)(19,21,25,32,24,31,23,22)(20,26,30,34,27,33,29,28)(11,13,14,18)(12,15,16,17)(20,27)(26,33)(28,34)(29,30)(3,5,6,9)(4,8,7,10)(19,22,23,31,24,32,25,21)(20,28,29,33,27,34,30,26)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.