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)(21,22,26,24)(23,30,32,36)(25,33,35,29)(27,34,28,31)(1,2)(3,4)(6,11)(8,9)(12,18)(13,14)(15,16)(19,20)(21,23,26,32)(22,27,24,28)(25,34,35,31)(29,36,33,30)(2,4)(5,7,10,17)(6,12,14,20)(8,15,9,16)(11,18,13,19)(21,24,26,22)(23,27,32,28)(25,29,35,33)(30,31,36,34)(5,8)(7,15)(9,10)(11,13)(16,17)(18,19)(21,23)(22,28)(24,27)(25,34)(26,32)(29,30)(31,35)(33,36) 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.