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