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