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