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