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