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