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