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