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