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