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