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