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