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