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