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