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