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