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