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