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