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