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