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