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