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