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