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