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