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