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