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