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