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