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