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