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