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