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