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