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