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