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