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