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