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