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