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