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