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