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