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