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