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)(18,24)(19,26)(20,22)(21,28)(25,32)(27,30)(1,3)(2,6)(4,7)(5,8)(9,11)(10,12)(13,15)(14,16)(17,18,20,30,23,27,22,24)(19,28,31,21,26,25,29,32)(1,4,5,2)(3,7,8,6)(10,15)(11,16)(17,19)(18,25)(20,31)(21,24)(22,29)(23,26)(27,28)(30,32)(3,8)(6,7)(9,12,14,13)(10,11,15,16)(17,20,23,22)(18,24,27,30)(19,29,26,31)(21,25,32,28)(9,13,14,12)(10,11,15,16)(17,21,22,28,23,32,20,25)(18,26,24,31,27,19,30,29)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.