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