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