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