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