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