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