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