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