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