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