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