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