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