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