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