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)(11,14)(12,13)(15,16)(17,18,22,25)(19,28,26,21)(20,24,30,32)(23,27,31,29)(1,2)(3,6)(4,8)(5,7)(17,19,22,26)(18,21,25,28)(20,31,30,23)(24,27,32,29)(10,13)(14,16)(17,20,23,19,22,30,31,26)(18,24,27,28,25,32,29,21)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,14,13,16)(18,25)(21,28)(24,32)(27,29)(1,4,5,3)(2,6,7,8)(17,21,23,24,22,28,31,32)(18,26,27,20,25,19,29,30)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.