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