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