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