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