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