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