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