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