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