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