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)(11,15)(12,16)(13,14)(17,18,21,25)(19,22,26,30)(20,23,28,24)(27,29,32,31)(1,3,5,4)(2,6,7,8)(10,14)(11,12)(17,19)(18,22)(20,27)(21,26)(23,29)(24,31)(25,30)(28,32)(9,11,13,12)(10,15,14,16)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31)(1,4,5,3)(2,6,7,8)(11,12)(15,16)(19,26)(22,30)(27,32)(29,31)(9,12,13,11)(10,16,14,15)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.