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