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