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