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