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