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