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