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