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)(11,14)(12,16)(13,15)(17,18,22,23)(19,24,21,26)(20,25,29,31)(27,32,30,28)(2,6)(7,8)(9,11,13,12)(10,14,15,16)(18,23)(19,24)(21,26)(25,31)(27,32)(28,30)(1,3,5,4)(2,7,6,8)(10,15)(14,16)(17,19)(18,24)(20,28)(21,22)(23,26)(25,27)(29,32)(30,31)(9,12,13,11)(10,16,15,14)(17,20,22,29)(18,25,23,31)(19,27,21,30)(24,32,26,28)(1,4,5,3)(2,8,6,7)(17,21)(18,26)(19,22)(20,28)(23,24)(25,27)(29,32)(30,31)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.