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