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