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