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