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