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