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)(11,16)(12,14)(13,15)(17,18,22,23)(19,24,29,32)(20,30,28,25)(21,26,27,31)(1,3)(2,5)(4,8)(6,7)(17,19)(18,24)(20,31)(21,30)(22,29)(23,32)(25,27)(26,28) involution — undirected(9,11,13,12)(10,14,15,16)(17,20,22,28)(18,25,23,30)(19,27,29,21)(24,26,32,31)(2,6)(5,7)(17,18,22,23)(19,24,29,32)(20,25,28,30)(21,31,27,26)(3,8)(5,7)(9,12,13,11)(10,14,15,16)(17,21)(18,26)(19,28)(20,29)(22,27)(23,31)(24,25)(30,32)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.