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