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