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