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