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