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)(11,15)(12,13)(14,16)(17,18,22,20)(19,23,28,26)(21,24,30,29)(25,31,27,32)(10,13)(11,16)(17,19,22,28)(18,23,20,26)(21,25,30,27)(24,31,29,32)(2,6)(7,8)(9,11,12,16)(10,14,13,15)(19,25)(21,30)(23,31)(24,29)(26,32)(27,28)(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,22,18)(19,26,28,23)(21,29,30,24)(25,32,27,31)(1,4,5,3)(2,8,6,7)(19,25)(21,30)(23,31)(24,29)(26,32)(27,28)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.