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