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