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