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