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