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