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