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