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