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