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