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