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