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