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