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