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