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