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