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