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