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