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