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