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