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