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