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