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