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