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