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