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