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