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