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