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