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