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