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