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