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