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