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