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