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