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)(17,20)(21,22)(23,30)(24,28)(25,29)(26,27)(31,33)(32,36)(34,35)(2,4)(7,8)(10,11)(13,14,16,18)(15,17,19,20)(22,27)(23,28)(29,35)(31,36)(1,2,3,4)(5,7,9,8)(6,10,12,11)(13,15)(14,17)(16,19)(18,20)(21,23)(22,24)(25,31)(26,28)(27,30)(29,32)(33,35)(34,36)(5,8,9,7)(6,11,12,10)(13,14)(15,17)(16,18)(19,20)(21,24)(22,28)(23,27)(25,33)(26,30)(29,31)(32,34)(35,36)(5,6)(7,10)(8,11)(9,12)(13,15)(14,17)(16,19)(18,20)(21,25)(22,29)(23,31)(24,32)(26,34)(27,35)(28,36)(30,33) 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.