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)(11,13)(12,14)(15,16)(17,18)(19,23)(20,30)(21,24)(22,25)(26,28)(27,31)(29,32) involution — undirected(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,23)(20,31)(21,28)(22,29)(24,26)(25,32)(27,30) involution — undirected(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,20,30,18,22,24,21,25)(19,26,27,32,29,31,28,23)(11,15)(13,16)(17,21,22,30)(18,24,25,20)(19,27,29,28)(23,31,32,26)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(17,21,22,30)(18,20,25,24)(19,27,29,28)(23,26,32,31)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.