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