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