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