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