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