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