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