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