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