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