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