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