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