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