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