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