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