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)(24,33)(25,35)(26,29)(27,32)(28,34)(30,36)(2,4)(5,7)(6,12)(8,14)(9,15)(10,17)(11,16)(13,20)(18,19)(21,23,26,28)(22,27,29,24)(25,33,36,32)(30,34,35,31)(5,8,9,6)(7,14,15,12)(10,13,11,18)(16,19,17,20)(21,24,26,27)(22,28,29,23)(25,31,36,34)(30,32,35,33)(7,15)(12,14)(16,17)(19,20)(22,29)(23,28)(30,35)(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.