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