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)(21,22,27,30,26,31,25,29)(23,32,33,36,24,28,34,35)(5,7)(6,11)(8,17)(9,15)(10,16)(12,20)(13,14)(18,19)(21,23,27,33,26,24,25,34)(22,28,30,35,31,32,29,36)(2,4)(21,24,27,34,26,23,25,33)(22,28,30,35,31,32,29,36)(5,8,10,9)(6,12,13,18)(7,15,16,17)(11,19,14,20)(21,25,26,27)(22,29,31,30)(23,33,24,34)(28,35,32,36)(5,9,10,8)(6,12,13,18)(7,15,16,17)(11,20,14,19)(21,25,26,27)(22,30,31,29)(23,34,24,33)(28,35,32,36)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.