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