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