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)(21,22,25,30)(23,29,26,27)(24,32,34,35)(28,31,36,33)(1,2)(3,4)(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(21,23,25,26)(22,27,30,29)(24,33,34,31)(28,32,36,35)(2,4)(21,24,26,33,25,34,23,31)(22,28,29,32,30,36,27,35)(6,11)(10,13)(12,19)(18,20)(21,22)(23,27)(24,28)(25,30)(26,29)(31,35)(32,33)(34,36) involution — undirected(2,4)(5,8,9,17)(6,12,11,19)(7,14,15,16)(10,18,13,20)(21,23,25,26)(22,29,30,27)(24,33,34,31)(28,35,36,32)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.