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