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