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