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)(17,18)(19,29)(20,22)(21,26)(23,27)(24,28)(25,31)(30,32)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19,22,31,24,30,23,26)(18,25,27,29,28,21,20,32)(1,3,4,7)(2,6,5,8)(11,15)(13,16)(17,20,22,18,24,27,23,28)(19,29,31,21,30,32,26,25)(11,15)(13,16)(17,21)(18,26)(19,27)(20,30)(22,32)(23,29)(24,25)(28,31) involution — undirected(19,30)(21,25)(26,31)(29,32) 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.