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