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)(11,14)(12,16)(13,15)(17,18,24,20)(19,25,31,28)(21,23,26,22)(27,30,32,29)(1,3,5,4)(2,6,8,7)(9,11,14,10)(12,16,13,15)(17,19)(18,25)(20,28)(21,27)(22,29)(23,30)(24,31)(26,32)(10,11)(15,16)(17,20,22,21,24,18,23,26)(19,27,30,28,31,32,29,25)(9,12,14,13)(10,15,11,16)(17,21,22,18,24,26,23,20)(19,28,30,32,31,25,29,27)(1,4,5,3)(2,7,8,6)(9,13,14,12)(10,16,11,15)(17,22,24,23)(18,21,20,26)(19,29,31,30)(25,27,28,32)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.