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