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)(18,24)(19,28)(20,30)(21,23)(25,31)(26,29)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,18)(19,20)(21,27)(22,24)(23,32)(25,28)(26,30)(29,31) involution — undirected(10,14)(11,16)(17,19,21,26,22,29,23,28)(18,25,32,31,24,30,27,20)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20,21,25,22,31,23,30)(18,26,32,29,24,28,27,19)(2,5)(6,8)(10,14)(13,15)(17,21,22,23)(18,27,24,32)(19,28,29,26)(20,25,31,30)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.