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