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