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