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