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