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