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