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)(17,18,23,21)(19,20,24,22)(27,31)(30,32)(1,3,5,8)(2,4,7,6)(9,11)(10,15)(12,13)(14,16)(17,19)(18,22)(20,21)(23,24)(26,29)(30,32)(1,3,5,8)(2,4,7,6)(9,12,14,15)(10,11,13,16)(17,20,23,22)(18,24,21,19)(25,26)(27,30)(28,29)(31,32)(1,3)(2,6)(4,7)(5,8)(9,12)(10,11)(13,16)(14,15)(17,21,23,18)(19,20,24,22)(1,4,5,6)(2,3,7,8)(9,13,14,10)(11,12,16,15)(17,22,23,20)(18,24,21,19)(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.