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