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