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