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