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