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