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