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