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