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