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