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