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