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