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