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