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