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