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