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