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