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