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