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