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