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