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