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