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