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