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)(21,22,26,28)(23,29,33,36)(24,34,32,27)(25,35,31,30)(1,2,4,3)(6,9)(10,12)(13,15)(14,17)(16,19)(18,20)(21,23,31,24,26,33,25,32)(22,27,35,36,28,34,30,29)(1,3,4,2)(15,19)(17,20)(22,28)(27,34)(29,36)(30,35)(5,7,8,11)(6,10,9,12)(21,24,31,33,26,32,25,23)(22,29,35,27,28,36,30,34)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.