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