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