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