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