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