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