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