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