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