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