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