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