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