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