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