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