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