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