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