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