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