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