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