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