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