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