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