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