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