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