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