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