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