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