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