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