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