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