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