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