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