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