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