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