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