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