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