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