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