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