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