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