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