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