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