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