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