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