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