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