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