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