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