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