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)(21,22,28,33,27,32,26,31)(23,29,34,24,35,36,25,30)(2,3)(5,6,9,12)(7,13,14,10)(8,17,16,11)(15,18,20,19)(21,23,27,35)(22,29,32,36)(24,31,30,33)(25,28,34,26)(5,7)(6,10)(8,15)(9,14)(11,18)(12,13)(16,20)(17,19)(21,24,27,30)(22,25,32,34)(23,33,35,31)(26,36,28,29)(1,3,4,2)(7,14)(10,13)(15,20)(18,19)(21,25,27,34)(22,30,32,24)(23,26,35,28)(29,31,36,33)(5,8,9,16)(6,11,12,17)(7,15,14,20)(10,18,13,19)(21,26,27,28)(22,31,32,33)(23,34,35,25)(24,36,30,29)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.