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