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