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