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