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