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