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