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)(19,23)(20,25)(21,26)(22,24)(27,30)(28,31)(29,32) involution — undirected(2,6)(7,8)(9,10)(11,16)(12,15)(13,14)(17,19,22,27)(18,23,24,30)(20,29,28,21)(25,32,31,26)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(18,24)(19,27)(20,28)(26,32)(1,4,5,3)(2,8,6,7)(9,11,13,12)(10,15,14,16)(17,20,21,19,22,28,29,27)(18,25,26,23,24,31,32,30)(2,6)(7,8)(9,12,13,11)(10,15,14,16)(17,21,22,29)(18,26,24,32)(19,20,27,28)(23,25,30,31)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.