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