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