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