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