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