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