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