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