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