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