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)(19,28)(20,21)(22,30)(23,24)(25,29)(26,32)(27,31)(3,7)(5,8)(9,10,13,12)(11,14,15,16)(18,24)(19,29)(21,26)(27,30)(1,2)(3,5)(4,6)(7,8)(10,12)(11,15)(17,19)(18,25)(20,30)(21,31)(22,26)(23,29)(24,28)(27,32) involution — undirected(9,11,13,15)(10,14,12,16)(17,20)(18,26)(19,30)(21,24)(22,25)(23,32)(27,29)(28,31)(1,3)(2,5)(4,7)(6,8)(9,11)(10,14)(12,16)(13,15)(17,21,23,26)(18,20,24,32)(19,31,29,22)(25,30,28,27)(1,2)(3,5)(4,6)(7,8)(9,12,13,10)(11,16,15,14)(17,22,23,31)(18,27,24,30)(19,26,29,21)(20,25,32,28)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.