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