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