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