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)(23,30)(24,28)(25,27)(26,31)(29,33)(32,34)(35,36)(5,6,9,10)(7,11,8,12)(15,19)(17,20)(21,23,24,31)(22,26,28,30)(25,32,33,36)(27,35,29,34)(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.