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