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