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