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