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