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