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