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