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