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