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