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