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