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