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