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