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