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