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