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