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