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)(17,18,20,22)(19,23,27,24)(21,25,28,30)(26,32,29,31)(2,6)(7,8)(9,11,12,15)(10,13,14,16)(18,22)(19,26)(21,28)(23,31)(24,32)(27,29)(1,3,5,4)(2,7,6,8)(10,14)(13,16)(17,19)(18,23)(20,27)(21,29)(22,24)(25,31)(26,28)(30,32)(1,4,5,3)(2,8,6,7)(19,26)(21,28)(23,32)(24,31)(25,30)(27,29)(17,19,20,27)(18,24,22,23)(21,29,28,26)(25,32,30,31)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.