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