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