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