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)(11,12)(13,14)(15,16)(17,18,21,23)(19,20,24,22)(25,26,28,30)(27,31,32,29)(1,3)(2,7)(4,6)(5,8)(10,14)(12,15)(17,18)(19,22)(20,24)(21,23) involution — undirected(2,8)(3,4)(9,11,13,16)(10,12,14,15)(17,19,21,24)(18,22,23,20)(1,4,6,3)(2,5,8,7)(9,11)(10,15)(12,14)(13,16)(17,19)(18,20)(21,24)(22,23)(25,27,28,32)(26,29,30,31)(1,5)(2,3)(4,8)(6,7)(9,12,13,15)(10,11,14,16)(17,20)(18,19)(21,22)(23,24)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.