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