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