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