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