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