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