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