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