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