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