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