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