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