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