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