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