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