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