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