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