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