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)(18,24)(19,27)(20,22)(21,26)(25,32)(28,31)(1,3)(2,5)(4,7)(6,8)(9,11)(10,13)(12,15)(14,16)(17,18,22,24,23,21,20,26)(19,28,29,32,27,25,30,31)(2,6)(3,7)(17,19)(18,25)(20,30)(21,28)(22,29)(23,27)(24,31)(26,32) involution — undirected(2,6)(5,8)(11,15)(13,16)(17,20,23,22)(18,26,21,24)(19,29,27,30)(25,31,28,32)(17,21,22,26,23,18,20,24)(19,28,29,32,27,25,30,31)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.