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