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