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