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