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