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