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