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