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