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