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