One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,10,12,9,14,8,13)(7,11,15,20,16,18,17,19)(21,22,26,29,25,30,24,28)(23,31,33,36,32,27,34,35)(1,2,4,3)(5,7,8,17,9,16,10,15)(6,11,13,19,14,18,12,20)(21,23,24,34,25,32,26,33)(22,27,28,36,30,31,29,35)(6,12)(7,15)(8,10)(11,18)(13,14)(16,17)(22,28)(23,32)(24,26)(27,35)(29,30)(31,36) involution — undirected(1,3,4,2)(7,16)(11,18)(15,17)(19,20)(21,24,25,26)(22,29,30,28)(23,33,32,34)(27,36,31,35)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.