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