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