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