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