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