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