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