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