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