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