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