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