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