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