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