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