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