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