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