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