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