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