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