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