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