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