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