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