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