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