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