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