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