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)(19,25)(20,26)(21,27)(22,24)(23,30)(28,29)(31,32)(1,2,5,3)(4,6,8,7)(9,10)(11,14)(12,15)(13,16)(17,19)(18,23)(20,28)(21,29)(22,30)(24,25)(26,32)(27,31)(2,3)(4,8)(9,11,13,12)(10,14,16,15)(18,24)(21,26)(23,25)(29,32)(4,8)(6,7)(17,19)(18,25)(20,31)(21,29)(22,30)(23,24)(26,32)(27,28) involution — undirected(1,3,5,2)(4,7,8,6)(9,11,13,12)(10,14,16,15)(17,20,22,27)(18,26,24,21)(19,28,30,31)(23,32,25,29)(1,4,5,8)(2,6,3,7)(9,12,13,11)(10,15,16,14)(17,21,22,26)(18,27,24,20)(19,29,30,32)(23,31,25,28)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.