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