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)(17,18,22,24)(19,21,27,23)(20,25,29,31)(26,28,32,30)(2,5)(6,7)(9,10)(11,15)(12,16)(13,14)(18,24)(20,28)(21,23)(25,26)(29,30)(31,32) involution — undirected(10,14)(15,16)(17,19)(18,21)(20,26)(22,27)(23,24)(25,28)(29,32)(30,31) involution — undirected(9,11,13,12)(10,15,14,16)(17,20,22,29)(18,25,24,31)(19,26,27,32)(21,28,23,30)(1,3,4,8)(2,6,5,7)(9,12,13,11)(10,16,14,15)(17,21,22,23)(18,19,24,27)(20,28,29,30)(25,26,31,32)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.