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