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