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)(15,18)(16,20)(17,19)(23,29)(26,35)(30,36)(31,34)(6,9)(10,12)(13,15,17,16)(14,18,19,20)(21,22,24,27)(23,30,29,36)(25,33,32,28)(26,34,35,31)(5,7)(6,10)(8,11)(9,12)(14,19)(18,20)(21,23,24,29)(22,26,27,35)(25,34,32,31)(28,36,33,30)(2,4)(7,11)(10,12)(13,16,17,15)(14,20,19,18)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.