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