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)(18,19)(20,28)(21,22)(24,31)(25,26)(29,30)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,18,21,19,23,26,22,25)(20,24,28,27,30,31,29,32)(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,19,21,26,23,25,22,18)(20,27,28,31,30,32,29,24)(1,4,5,3)(2,8,6,7)(17,20)(18,24)(19,27)(21,28)(22,29)(23,30)(25,32)(26,31)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.