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