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