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