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