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