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