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