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