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