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