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