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