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