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