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