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