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