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