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