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