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