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