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