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