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