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)(21,22,23,32,26,31,27,28)(24,35,34,29,25,36,33,30)(5,6,8,9)(7,10,11,12)(13,15,16,19)(14,17,18,20)(21,23,26,27)(22,28,31,32)(24,34,25,33)(29,35,30,36)(2,4)(5,7,8,11)(6,10,9,12)(15,19)(17,20)(21,24,26,25)(22,29,31,30)(23,33,27,34)(28,36,32,35)(6,9)(10,12)(21,25,26,24)(22,30,31,29)(23,34,27,33)(28,35,32,36)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.