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