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