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