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