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