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