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