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