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