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