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