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