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