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