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)(21,22,28,33)(23,29,25,30)(24,34,35,36)(26,32,27,31)(2,3)(7,13)(8,16)(10,17)(11,15)(21,23,28,25)(22,29,33,30)(24,31,35,32)(26,36,27,34)(5,7,9,13)(6,10,12,17)(8,14,16,19)(11,18,15,20)(21,24,27,30,28,35,26,29)(22,23,32,34,33,25,31,36)(1,3,4,2)(7,13)(10,17)(14,19)(18,20)(21,25,28,23)(22,30,33,29)(24,32,35,31)(26,34,27,36)(5,8,9,16)(6,11,12,15)(7,14,13,19)(10,18,17,20)(21,26,28,27)(22,31,33,32)(23,34,25,36)(24,30,35,29)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.