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