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