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