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