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